i use thundershif cam arm weights since severals seasons yet on my 400 and use titanium primary spring
also for a couples years also,rencently i've got a set of sled clutch bolt (those are aluminum made) and
the stock ones was heavy steel made,by remplacing them with thise lighter and REMOVING all washer bolt'
i end up to close 9 grams of rotating mass less,it does feel a differences especially in the lower
rpm as quicker throttle response and less clutch binding and noise,clutch cover seem to fit better without the washer,
try it out!

 

9 grams ? lol thats a good 1

 

Hey, 9 grams is 9 grams. Evevy little bit helps when your talkin rotating mass. Im going to send my flywheel to RCR again for some "extreme" lightening.
Are you speaking of the bolts that hold the weights in Scramblerd?

 

they already put 55 g of weights in those clutch buddy,so a 9 g of decrease make felt the trigger a little more nervous i'll tell ya,i work with adjustables weight on sled and that quad for years and i known what talk about when it come to clutching,it doesn't make a differences like the weight itself when you drop weight at it cauze isn't into the spider and inner inertia of the clutch but,it does help out,i'm talking about the clutch's bolt
cover,there is washer lock behind,remove those and put sled bolt back in the cover clutch,then spin the motor at idle,you'll hear a snappier sound.

 

the 6 washer lock clutch bolt weight 7,4 g alone!

 

When you lose by a foot, or 1 1hundredth of a second anything and everything should be considered. Doc

 

and to be very honest over polaris clutch,the 03 trailblazer 400 doesn't have those washer in and use an other type of clutch bolt so probably the factory cattch up before me anyway,go see at partsland.com.